Grinding machine.



O. R. H. ZEITZ.

GRINDING MAOHINE.

APPLICATION FILED SEPT. 24, 1 12.

Patented Nov. 26, 1912.

' 2 s'nsmswsnsm 1.,

O. R. H. ZEITZ.

GRINDING MACHINE.

APPLICATION FILED 533m. 24, 1912.

. 2 snnms'-snnm 2.

Patented Nov. 26

and the toothed rim 14 will not be afiected' by the wheel 15; If: however the toothed run 23 is rotated, the spindle 7 will be of course moved relatively to the spindle 2, and-therefore the tool holder will be shifted.

' What I claim is:- i

1. In a machine of the character de scribed, a hollow outer spindle, a concentric hollow inner adjustin spindle, a too 1061 wheel on the outer spindle, a like toothed wheel on the inner spindle, a fixed toothed rim and a'rotatable toothed riin concentric respectively to said first and second toothed wheels, an arm rotatable around the spin:

dles, pinions rotatable on the arm and con-' necting said toothed wheels with the respective toothed rims, and means for setting the rotatable rim' whereby the adjusting .spindle is shifted relatively to the outer spindle.

2. In a machine of the character de scribed, a hollo'w'outer spindle, a concentric hollow inner adjusting spindle, a toothed wheel on the outer spindle, a like toothed wheel-on the inner spindle, a fixed toothed rim and a rotatable toothed rim concentric I respectively to said first and second toothed wheels, an arm rotatable around the spindles, pinions rotatable on the armand connecting said toothed wheels with the re spective toothed rims, means for setting the engaged by "scribed, a hollow rotatable rim, :1 ust1ng spurdl 'trinej it ed Whueh mending to; uni ring and a tool holv oi ti.

hollow inner :rd' spindle ens n1" wheel on th wheel on the n rim and a rota respectively to Wheels, an er .r 1 dl'es, pinions rotsmnne on the arm and min necting toothed wheels with the rcspeetive toothed rims, means for $15 fine; the re tatable rim,,a toothed Wheel on the adjusting spindle, an eccentric toothed ring engaged by said last named {or ed. \yl'weh tool holder depending from said ring, a grinding spindle carried by the tool holder, and means for operntively norm "mg the driving spindle to the grind,- 4] mile.

In testimony whereof l. he; ml n1 name to this eye ltio'n in the, nn-Juice o" two subscribing, tnesses'a the titl- 

